Amphibolips (niger) elatus, n. sp.
Agamic form

Gall. — Yellow tan and rosy russet, brighter when fresh, weathering dark to brown and grayish black; some galls quite large, with many smaller ones in each series; up to 6.0 mm,, but averaging only 4.0 mm. in diameter.

Host. —- Quercus Eduardi, the shining and prickly-leaved black, live oak of the area, a close relative of the American Q. emoryi

Range. — Chihuahua: Pedernales, 2 E, 7590’ (Q. Eduardi).

Known only from the one locality in more southern Chihuahua, but possibly extending north throughout the state. Replaced still further south in Chihuahua by A. nebris.

Life History. — Adults: March 20. April 10, 13, 20.

This species, elatus, is probably widespread through the state of Chihuahua. A hundred miles south Of Pedernales, which is the type locality of elatus, there is another species, nebris, on the southernmost border of Chihuahua. But elatus is more closely related to jubatus, the common species in Durango, and not so closely to nebris. From, jabatus, elatus is distiuguishable by the fact that the galls of elatus are very much larger and more tan yellow and rosy russet.